Nga investigated the use of biochar to filter agricultural wastewater as well its suitability as a soil fertiliser. She developed two bamboo-based biochar filter systems that proved very efficient at adsorbing nutrients such as ammonia, nitrates, nitrites and phosphates. The used biochar was also shown to be effective as a fertiliser leading to increased plant health when tested, demonstrating real potential for biochar to be used in the animal husbandry industry.